Dermoscopic Patterns of Acral Melanocytic Nevi

Saida, Toshiaki; Koga, Hiroshi

doi:10.1001/archderm.143.11.1423

Cited by 76 publications

(20 citation statements)

References 15 publications

(22 reference statements)

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“…Most of the publications pertaining to the dermoscopic features of acral melanoma and nevi are derived from research conducted in Asian patient populations [1,2,3,4,5,6,7]. This may be primarily due to the fact that acral melanoma is the most frequent melanoma subtype encountered in people of Asian descent [8].…”

Section: Methodsmentioning

confidence: 99%

Dermoscopy of Acral Melanoma: A Multicenter Study on Behalf of the International Dermoscopy Society

et al. 2013

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Background: Most studies on dermoscopy of acral lesions were conducted in Asian populations. In this study, we analyzed these features in a predominantly Caucasian population. Objective: Estimate the prevalence of dermoscopic features in acral lesions, and assess their level of agreement between observers. Methods: In this retrospective multicenter study, 167 acral lesions (66 melanomas) were evaluated for 13 dermoscopic patterns by 26 physicians, via a secured Internet platform. Results: Parallel furrow pattern, bizarre pattern, and diffuse pigmentation with variable shades of brown had the highest prevalence. The agreement for lesion patterns between physicians was variable. Agreement was dependent on the level of diagnostic difficulty. Conclusion: Lesions with a diameter >1 cm were more likely to be melanoma. We found as well that a benign pattern can be seen in parts of melanomas. For this reason one should evaluate an acral lesion for the presence of malignant patterns first.

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Section: Methodsmentioning

confidence: 99%

Dermoscopy of Acral Melanoma: A Multicenter Study on Behalf of the International Dermoscopy Society

et al. 2013

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“…We performed a biopsy in the graft-hyperpigmentation transitional area and in the perigraft hyper-pigmentation area, following the algorithm proposed by Saida et al 3,4 Two other areas were biopsied for academic purposes and with the patient's informed consent: the normal acral skin and the graft itself. …”

Section: Case Reportmentioning

confidence: 99%

Case report: dermoscopic and histological aspects of skin graft and perigraft hyperpigmentation in acral location

Tuma

Yamada

Medeiros³

et al. 2014

An. Bras. Dermatol.

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Little is known about the use of dermoscopy in skin grafting. We describe the case of a patient with skin grafting and surrounding pigmentation on acral region. The dermoscopic findings were similar to those of benign acral lesions (lattice-like pattern) and reactive pigmentations (fine striae). Histopathology revealed pigment leakage and increased number of melanocytes. It is believed that this phenomenon occured as the result of an inflammatory stimulus.

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“…Dermoscopy increases the diagnostic accuracy for early ALM diagnosis, helping to differentiate it from acral nevi [ 19 – 23 ]. ALM is typified by pigmentation along the skin ridges, termed “parallel-ridge pattern” (PRP), while acral nevi display mostly the “parallel-furrow pattern” (PFP) [ 24 – 28 ]. Among ALMs, other dermoscopic patterns include the irregular diffuse pigmentation (IDP), defined as structureless, diffuse pigmentation with variable shades of brown to black color and without parallel disposition of pigment [ 22 – 24 , 28 ]; the multicomponent pattern, defined as exhibiting more than one predominant dermoscopic criteria [ 29 ] or a combination of pigmentation patterns [ 30 ]; and the polymorphic vascular pattern that is especially seen among amelanotic acral melanomas.…”

Section: Introductionmentioning

confidence: 99%

Acral lentiginous melanoma in the Turkish population and a new dermoscopic clue for the diagnosis

Özdemir

Errico

Yaman

et al. 2018

Dermatol Pract Concept

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BackgroundThe incidence of acral lentiginous melanoma (ALM) in the white population is low. Dermoscopy enhances diagnosis of ALM; however, diagnostic accuracy may sometimes be poor due to the considerable proportion of amelanotic ALM variants.ObjectivesTo calculate the proportion of ALM among all melanoma subtypes and to determine the frequency of dermoscopic features of ALM in the Turkish population.MethodsOut of 612 melanomas, there were 70 cases of ALM, of which 46 showed sufficient image quality for retrospective study of dermoscopic features. Data from patients and their lesions was classified according to clinical features and histopathologic parameters. The dermoscopic variables evaluated were based on pertinent literature on dermoscopy of acral melanocytic neoplasms.ResultsThe prevalence of ALM among all melanoma subtypes was 11.4%. Parallel-ridge pattern (PRP) was detected in 60.8% of cases and irregular diffuse pigmentation (IDP) in 28.3%. The ALMs were amelanotic in 24%, showing an atypical vascular pattern in all cases; a new dermoscopic pattern, named “vascularized parallel-ridge pattern” (VPRP), was detected in 13% of ALMs. Irregular lines were observed in 81.8% of subungual melanomas and were often associated with a multicolored background.ConclusionsALM has site-specific dermoscopic patterns, with PRP being the most prevalent pattern. The newly described VPRP pattern may be an additional clue for ALM diagnosis, especially in thin amelanotic melanomas.

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Dermoscopic Patterns of Acral Melanocytic Nevi

Cited by 76 publications

References 15 publications

Dermoscopy of Acral Melanoma: A Multicenter Study on Behalf of the International Dermoscopy Society

Dermoscopy of Acral Melanoma: A Multicenter Study on Behalf of the International Dermoscopy Society

Case report: dermoscopic and histological aspects of skin graft and perigraft hyperpigmentation in acral location

Acral lentiginous melanoma in the Turkish population and a new dermoscopic clue for the diagnosis

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